Twin-arranged friction draft-gear.



J. F. OCONNOR.

TWIN ARRANGED FRIGTION DRAFT GEAR.

APPLICATION FILED 1320.13, 1913. 1,1 30,01 3. Patented Mar. 2, 1915.

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APPLICATION FILED DEC 13 1913.

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JOHN F. ocoNNoR, 0F CHICAGO, ILLINOIS, AssIGNoR 'ro *ii/"remain Minna, oF

cHioAGo, ILLINoJtsv TWINARRANGED FRIC'ION DRAFT-GEAR.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed December 13, 1913. Serial No. 806,391,

transmitted to the center sills at a. plurality of points.

The invention furthermore consists in the improvements in the parts and devices and in the novel combinations of the parts and devices herein shown, described or claimed. In the drawing forming a part of this specification, Figure l is a part plan and part horizontal section of a di'af-gear embodying my improvements. Fig. 2 is a part side elevation, part vertical section taken on the line 2-2 of Fig. l. Fig. 3 is a transverse vertical section taken on line 3M?) of Fig. 1, and Figs. 4 and 5 are detail perspective views of the two casings employed in my gear. i

In said drawing the car center sills are designated by the reference 10, the same being slotted as at Il and 19. IVithin the slots l1 are placed elongated stop castings I3 which are. securely riveted to the/sills and which are provided with outwardly extended llanges I4 slotted so as to provide two keyways l5 and IG. Also secured to the center sills I() arc the upper and lower front stops 17, the latter being slotted in alinement with the slots l2 to receive therethrough a coupler and yoke-connectinglr key` IS. The key IS passes through a suitable slot in the butt cnd of the draw-bar 19 and through elongated slots 20 in draft links 2l. At their rear ends, the links 21 are slotted to receive they transversely extending key 22 which moves with the links and `form therewith a -voke operating: in the ordinary manner. Intermediate the keys I8 and 22 and operable in the. slots IG is another transversely extending key 3 which also passes through elongated slots 24 in the links 2l. Between the links il and in engagement with the inner end oi' the coupler is a front,

vertically elongated fo' ower 25 recessed ou each side, as at 2G, to over the links 21. 'Io the rear of the front follower and between the links are two casings 27 and 2S, the former beiner herein referred to as the main casing and the. latter as the auxiliary casing. The n n casing 27 is rcvided with two ing pockets 'F28 arranged in par 'above the other and in which are t with each spring integral with the casing 27 is a fric ieil 250, in each of which shells rated and coperable therewith, :i set e, riet'on elements comprising friction sin 3l and spreader or wedge 32, the latter being' in engagement pocket 128 and with the rear side of the front follower 25. l

To hold the parts properly assembled and to provide a certaiii amount of initial cornpression on the main springs, through bolts 33 are provided which extend through the rear wall 3lY of the main casing and through the front follower. 'cated most clear-lv in Fig. 2. To the re s' of the back Wall 3l, the casing 2 provided with cylindrical spring poclt arranged in alinement with the main 'ng pockets 28. The casing,r 2S is provide with cylindrical por tions 3G which tele2. e over the parts 35 of the main casing and `netween the rear wall 34 of the main ing and the back wall 37 of 'the anxili i' casing are placed two sets of nested preinwinary compression springs 3S which nom i v separate the casings to the extent l ed in Fig. 'f. The casing 2S, on each f1 thereof, is provided with forwardljv" es n il arms 3S which slide and operate ,spondingly located and shaped e' G on the sides of the main casing 2T. e arms BS are slotted, as indicated at n'il receive. the key 22, said key also passing` .irough a oorresi'iondingly located slot it in the central portion of the casing;r 2T, it being understood that the. slots 4l and rlf2 are all longer than the width of the key l, The main casing 27 is also provided with another slot 43 adapted to receive the key QS.

The operation is as' follows: Under buil", the draw-liar will force the. follower backwardly, which in ta will move the main .casingr 27 with the 'frieilon mechanism therein and comp the eliminary compression springs iloI from rearward movement by the key 22. After the preliminary compression springs have been compressed the main casing 27 `will be brought to rest, since it will engage with the casing 28 telescoped therewith and the key 23 will come into engagement with the rear ends of the slots 16 in the stop castings. In this way the heavy shocks under buff are distributed to the castings at four different points and the strain on the rear key 22 is thereby relieved and the shocks more evenly transmitted to the center sills. Continued rearward movelnent brings the friction mechanisms into action. Under pull, the links 21 with the key 22 will be moved forwardly, which in turn will move the casing 28 to compress the preliminary compression springs 38, movement of the main casing 27 being prevented on account of the greater resistance to movement due to the friction mechanisms contained therein. When the two casings 27 completely telescoped a continued forward movement of the links 21 and key 22 will move the casing 27 and bring the friction mechanisms into operation and the parts brought to rest when the casing 27 abuts the front follower 'and the key 23 engages the front ends of the slots 16. The intermediate 30"key 23 supports the main casing 27 and perpression 352- mits the removal at any time of the smaller casing 28 and the preliminary compression springs 38 for repairs or renewal of 'the comsprmgs. y From the preceding description it will be seen that I have provided a friction draft gear of high capacity in which two complete sets of friction mechanisms and preliminary compression springs are employed and which are arranged in parallel one above the other.' The construction is also such that the severe buliing shocks are transmitted to the center sills at four different points.

Although I have herein shown and described what I now consider the preferred embodiment of my improvements, yet it will be understood that various changes I -and modifications may beA made without departing from the spirit of the invention, and all such changes and modifications are contemplated as come within the scope of the claims l appended hereto.

I claim:

,1. In a railway draft gear, twomembrs relatively longitudinally movable, one of saidl members having two sets of twinand 28 have been arranged main springs and friction mechanisms, a preliminary compfession spring between said members-and means for transmitting the shocks under bud, separately from each of said members to the center sills, said means including two horizontally extending keys passing through said members and slidable in slots in the center sills, substantially as specified.

2. In a railway draft gear, a draw-bar; a yoke, the latter including a transversely extended key; two casings relatively longitudinally movable and having preliminary compression springs therebetween, said key slidably engaging both of said casings, one of said casings having sets of twin-arranged main springs and friction mechanisms therewithin; and a second key extended through the casing having the friction mechanisms therein and adapted to support the same, substantially as specified.

3.*In a railway draft-gear, in combination: two casings telescoped with respect to each other and relatively longitudinally movable; twin-arranged sets of main springs and friction mechanisms within one of sai casings; preliminary compression springs interposed between said casings in twin ar rangement and in alinement with the friction mechanisms; a key extended through slots in both of said casings to thereby connect the same; links connecting said key` with the draw-bar; and a second key passing through said casing having the friction mechanisms therein and through slots in said links and adapted to support the casing, substantially -as specified.

4. In a railway draft gear, two members relatively longitudinally movable, one of said members being provided with' main springs and friction mechanism therewithin, a preliminary compression sprin between said members, and extending throughslots in both of said members to thereby slidably connect the same together and the other of said Ake s passing through the member provided wit the main springs and friction mechanism and adapted. to support the same.

Signed Ithis 9th day of-December, 1913, in the presence of two Witnesses.

JOHN F. OCONNOR.

Witnesses: v

WILLIAM A. Galena, J osErH HARRIS.

two keys, one o said keys 'i 

